shithub: cstory

ref: 95f370a720f5c719b5b6d82ae5b0cb9b784b9c8d
dir: /external/SDL2/test/testaudioinfo.c/

/*
  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely.
*/
#include <stdio.h>
#include "SDL.h"

static void
print_devices(int iscapture)
{
    const char *typestr = ((iscapture) ? "capture" : "output");
    int n = SDL_GetNumAudioDevices(iscapture);

    SDL_Log("Found %d %s device%s:\n", n, typestr, n != 1 ? "s" : "");

    if (n == -1)
        SDL_Log("  Driver can't detect specific %s devices.\n\n", typestr);
    else if (n == 0)
        SDL_Log("  No %s devices found.\n\n", typestr);
    else {
        int i;
        for (i = 0; i < n; i++) {
            const char *name = SDL_GetAudioDeviceName(i, iscapture);
            if (name != NULL)
                SDL_Log("  %d: %s\n", i, name);
            else
                SDL_Log("  %d Error: %s\n", i, SDL_GetError());
        }
        SDL_Log("\n");
    }
}

int
main(int argc, char **argv)
{
    int n;

    /* Enable standard application logging */
    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

    /* Load the SDL library */
    if (SDL_Init(SDL_INIT_AUDIO) < 0) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
        return (1);
    }

    /* Print available audio drivers */
    n = SDL_GetNumAudioDrivers();
    if (n == 0) {
        SDL_Log("No built-in audio drivers\n\n");
    } else {
        int i;
        SDL_Log("Built-in audio drivers:\n");
        for (i = 0; i < n; ++i) {
            SDL_Log("  %d: %s\n", i, SDL_GetAudioDriver(i));
        }
        SDL_Log("Select a driver with the SDL_AUDIODRIVER environment variable.\n");
    }

    SDL_Log("Using audio driver: %s\n\n", SDL_GetCurrentAudioDriver());

    print_devices(0);
    print_devices(1);

    SDL_Quit();
    return 0;
}